Electric advertising device.



WILLIAM COGHBAN GILLESPIE, 0F P HQENIX, ABIZOHA.

ELECTRIC ADVERTISING DEVICE.

Specification of Letters Patent,

Patented'Mar. 20, 1917.

Application filed April 19, 1916. Serial No. 92,188.

To all whom it may concern;

Be it known that I, WILLIAM G. GILLES- PIE, a citizen of the UnitedStates, and a resident of Phoenix, in the county of ancopa and State ofArizona, have invented a certain new and useful Improvement in ElectricAdvertising Devices, of which the following is a specification.

My invention relates to improvements in electric advertising devices,and it consists in the combinations, constructions, and arrangementsherein described and claimed.

An object of my invention is to provide a device in which a series ofslides or plates may be brought succemively before a projectingapparatus where they may be left for a predetermined period and thenmoved while another slide or plate is brought into position.

A further object of my invention isto provide automatic electric meanscontrolled by a thermostat for accomplishing the above named object.

A further object of my invention is to provide novel operating meansincluding a pair of solenoids with means for actuating the solenoidsalternately.

Other objects and advantages will appear in the following specification,and the novel features of the device will be particularly pointed out inthe appended claims.

My invention is illustrated in the accompanying drawing forming part ofthis application, this drawing being a face view of the generalarrangement of the apparatus.

In carrying out my invention I provide a disk 1 having a series ofnotches 2 to rovide teeth 3 on its periphery. The dis is designed to besecured to a central shaft 4.

Disposed about the central shaft is a series of stop pins 5, whilefarther from the shaft is a series of rectangular openings, such asthose shown at 6. Over these openings may be placed the slides or plates7. The inner ends of these plates rest against the stop pins 5, whilethe outer ends may be held by the end of a leaf spring 8, which issecured at its center 9 to the disk 1. These springs are so placed thatone spring will hold two plates, as clearly hown 1n the drawing.

At 10 and 11 I have shown a pair of solenoids having a common core 12.The latter is provided with a pivoted pawl 13, which is held by means ofa spring 14 against the periphery of the disk. A spring 15 is providedfor preventing the backward move ment of the disk.

Secured to the core 12 is an arm 16 which engages a conducting rod 17slidably disposed m a frame or runway 18 carried on a bracket 19 securedto an insulating base plate 20. The latter is provided with the springcontacts 21 and 22, these contacts being arranged to be engaged bytherod 17 in its movement.

At 23 I have shown an insulating base upon which is mounted athermostatic member, which I have denoted in general by 24. The lattermay consist of a rod 24* which is secured at one end to a bracket 25,and whose opposite end is arranged to pass through a guide post 25. Therod 24 bears a laterally extending plate or arm 26, which forms amovable contact member. Secured to the base 23 are the posts 27 and 28,the former bearing a contact screw 29 and the latter a similar contactscrew 30. The explanation of the circuits will best be understood by astatement of the operation of the device.

Consider the apparatus in the position shown in the figure. Current willenter by one of the lead wires such as that shownat 31, and will takethe following path: 32, 33, 17, 21, 34, rheostat 24, 35, 36, 37 to leadwire 38. As soon as the thermostatic member begins to heat up the rod 24will begin to expand and will move the arm 26 into contact with thescrew 30. When this occurs, current will pass from the wire 34 by meansof conductor 39, through the solenoid 11, thence by means of conductor40 through screw 30, arm 26, conductor 41, and back to the other lead byway of 36, 37. The solenoid 11 being energized will cause the movementof the core 12 and the disk will be turned one tooth through the mediumof the pawl 13. The movement of the core 12 will cause the rod 17 tobreak contact with the spring 21 and to make contact with the spring 22.The solenoid 10 will not immediately be energized, but it will beenergized'as soon as the thermostatic member has cooled, therebybringing the contact 26 back against the contact screw 29. Thisenergizing circuit is as follows: from 31, through 32, 17 22, 42,solenoid 10, 43, 27, 26, wire 38; The energization of the solenoid 10will cause the retraction of the core 12,

36, 37, back tolead .device requires no further attention.

by moving them farther apart.

I claim 1. The combination with a rotatable disk, 7

of means for intermittently rotating said disk, said means comprising apair of solenoids, a common core for said solenoids, means connectedwith said common core for rotating said disk, and thermostatic means forcontrolling said solenoids.

2. The combination with a rotatable slide carrier, of means forintermittently rotating said slide carrier, said means comprising a pairof solenoids, a common core for said solenoids, means connected withsaid common core for rotating said slide carrier, and thermostatic meansfor controlling said solenoids, said thermostatic means being arrangedto energize one of said solenoids when heated and the other of saidsolenoids when cold.

3. The combination of carrier, having teeth on its periphery, of a pairof solenoids, a common core for said solenoids, a pawl carried by saidcommon core and arranged to engage the teeth of said carrier, a switcharranged to be operated by said core, and a thermostatic device arotatable controlled by said switch and having contacts forcontrollingthe circuits of the solenoids.

4. The combination of a rotatable slide carrier, having teeth on itsperiphery, of a pair of solenoids, a common core for said solenoids, apawl carried by said common coreand'arranged to engage the teeth of saidcarrier, 3, switch arranged to be operated by said core, and athermostatic device controlled by said switch and having contacts forcontrolling the circuits of the solenoids, the movement of thethermostatic member in one direction serving to complete the actuatingcircuit of one of said solenoids, and the movement of the thermostaticmember in the other direction serving to complete the actuating circuitof the other solenoid. I

5. The combination with a slide carrier having teeth on its periphery,of a pair of solenoids, a common core for said solenoids, a pawl securedto said common core and arranged to engage the teeth of the carrier, anarm carried by said core, a movable contact member secured to said arm,spring contacts arranged to be engaged by said movable contact member, athermostat having an expansible core, stationary contacts carried bysaid thermostatic member and arranged to be engaged by said arm,connections between said thermostatic member and said spring contacts,and connections between the contacts of the thermostatic member and saidsolenoids.

WILLIAM COCHRAN GILLESPIE. lVitnesses:

SARAH E. HENDERSON, O. E. PLATH.

